Make sure the Companion on your phone is the current one. The bast way to do this is to download it from the Google Play Store... That way, when it's updated by MIT, you'll get the update automatically.
If not, you can download the current companion from the AI User Interface... go to Help, and Companion information. Once you've downloaded it to your computer, email it to yourself and open that email on the phone, then install the Companion from the attachment in your email.